Finding the Fourth Proportional to 16,978.30, 23,429.59 and 9,424.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.30 : 23,429.59 = 9,424.60 : x
2. Step 2: Convert to fraction form
   16,978.30/23,429.59 = 9,424.60/x
3. Step 3: Cross multiply
   16,978.30x = 23,429.59 × 9,424.60
4. Step 4: Simplify right side
   16,978.30x = 220,814,431.78
5. Step 5: Solve for x
   x = 220,814,431.78/16,978.30
6. Step 6: Final answer
   x = 13,005.69